Why it matters: Gen. Miller says U.S. troops have been "more in an offensive mindset" since he took over two months ago, a change prompted by heavy casualties. But he says the U.S. acknowledges it can't win with force: "My assessment is the Taliban also realizes they cannot win militarily. So if you realize you can't win militarily at some point, fighting is just, people start asking why. So you do not necessarily wait us out, but I think now is the time to start working through the political piece of this conflict."